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<head>
    <meta charset="UTF-8">
    <title>后盾人</title>
    <style>
        main>ul li:nth-child(n+2) {
            color: red;
        }

        article h1:nth-of-type(2) {
            color: red;
        }
    </style>
</head>

<body>
    <main>
        <ul>
            <li>后盾人</li>
            <li>hdcms.com</li>
            <li>houdunren.com</li>
            <li>houdunwang.com</li>
        </ul>
        <article>
            <h1>后盾人</h1>
            <aside>
                <h2>houdunren.com</h2>
            </aside>
            <h1>hdcms.com</h1>
        </article>
    </main>
</body>

</html>